ZMQError: Resource temporarily unavailable

[karthik.sharma at gmail.com]

I am using zero-mq for IPC between two machines.

My zmq function is given below

    def recieve_messages(self):
             string = self.sub_socket.recv(flags=zmq.NOBLOCK)
             print('flow mod messages recieved {}'.format(string))


When I run the program however I get the following error.

      string = self.sub_socket.recv(flags=zmq.NOBLOCK)
      File "socket.pyx", line 616, in zmq.core.socket.Socket.recv (zmq/core/socket.c:5961)
      File "socket.pyx", line 650, in zmq.core.socket.Socket.recv (zmq/core/socket.c:5832)
      File "socket.pyx", line 119, in zmq.core.socket._recv_copy (zmq/core/socket.c:1669)
    ZMQError: Resource temporarily unavailable


Can someone explain what is likely causing this error.